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  2. Sulfur sticks - Wikipedia

    en.wikipedia.org/wiki/Sulfur_sticks

    Sulfur sticks are tools used in industrial ammonia refrigeration systems to detect minor ammonia leaks. A sulfur stick is made from a wick which contains particles of sulfur. The sulfur stick is lit and burns with an open flame, [1] and the color of the sulfur smoke is used to find the leak. When there is no ammonia present, the smoke is ...

  3. People sniffer - Wikipedia

    en.wikipedia.org/wiki/People_sniffer

    The detection method used by people sniffers depended on chemical compounds that are emitted only by human beings, [1] such as those found in urine and sweat. [2] The technology was developed by General Electric for the Army's Chemical Corps. Sweat, being partially composed of ammonia, when combined with hydrochloric acid produces ammonium ...

  4. Ammonia - Wikipedia

    en.wikipedia.org/wiki/Ammonia

    Ammonia is an inorganic chemical compound of nitrogen and hydrogen with the ... Sulfur sticks are burnt to detect small leaks in industrial ammonia refrigeration systems.

  5. Ninhydrin - Wikipedia

    en.wikipedia.org/wiki/Ninhydrin

    Ninhydrin (2,2-dihydroxyindane-1,3-dione) is an organic compound with the formula C 6 H 4 (CO) 2 C(OH) 2.It is used to detect ammonia and amines.Upon reaction with these amines, ninhydrin gets converted into deep blue or purple derivatives, which are called Ruhemann's purple.

  6. Gas detector - Wikipedia

    en.wikipedia.org/wiki/Gas_detector

    Because the sensor must come in contact with the gas to detect it, semiconductor gas sensors work over a smaller distance than infrared point or ultrasonic detectors. MOS sensors can detect different gases, such as carbon monoxide, sulfur dioxide, hydrogen sulfide, and ammonia.

  7. Qualitative inorganic analysis - Wikipedia

    en.wikipedia.org/wiki/Qualitative_inorganic_analysis

    Classical qualitative inorganic analysis is a method of analytical chemistry which seeks to find the elemental composition of inorganic compounds.It is mainly focused on detecting ions in an aqueous solution, therefore materials in other forms may need to be brought to this state before using standard methods.

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